alecstilleyedye said:check if you're already covered by your home/contents insurance. personal liability should cover you on the bike, but check with your insurance company. mine used an analogy of hurting someone with an errant golf ball, and confirmed that if i hurt someone with my bike, it was basically the same thing as far as they were concerned.
Indeed, always check your home contents insurance as Personal Liability will usually be covered for free, unless you have an odd policy that excludes cycling(never seen this). However, what will be excluded is racing and timetrialing.
The cover will be for injury and damage, up to stated limits and subject to there being fault on your part.
Read your policy for details and check with your insurance agent/company if required.